What was a significant challenge faced by Toyota in implementing just-in-time production?

The significant challenge faced by Toyota in implementing just-in-time production was the dependency on a consistent supply of materials. Just-in-time (JIT) production relies heavily on having the right materials delivered at the right time, minimizing inventory costs and reducing waste. This approach necessitates a highly synchronized supply chain, where delays or inconsistencies can lead to production stoppages or inefficiencies.

Toyota's success with JIT is fundamental to its competitive advantage, but it also means that the company must maintain close relationships with suppliers and ensure they can meet the stringent delivery schedules required. Any disruptions in the supply chain, whether due to natural disasters, logistical issues, or supplier difficulties, could severely impact Toyota's production capabilities. Thus, the dependency on a reliable supply of materials is essential for the effectiveness of JIT, making it a prominent challenge throughout its implementation.